3764727340

Appears in sequences

• Antichains (or order ideals) in the poset 2*2*5*n or size of the distributive lattice J(2*2*5*n).at n=7A006362
• Antichains (or order ideals) in the poset 2*2*7*n or size of the distributive lattice J(2*2*7*n).at n=5A056934